PW4 Output uname command

hbvit · 03-27-2026, 02:22 PM

Could you send your output of 'uname -a' command in kterm in kindle paperwhite 4

dhdurgee · 03-27-2026, 04:03 PM

[root@kindle root]# uname -a
Linux kindle 4.1.15-lab126 #1 SMP PREEMPT Tue Nov 27 03:27:44 PST 2018 armv7l GNU/Linux
[root@kindle root]#

hbvit · 03-28-2026, 08:46 AM

Which version of firmware is installed?

hbvit · 03-28-2026, 09:02 AM

Could you download JRE version 17 from GitHub and check its work on your Paperwhite.

https://github.com/adoptium/temurin1....0.18_8.tar.gz

Extract archive and run jdk-17.0.18+8-jre/bin/java -version

hbvit · 03-29-2026, 04:22 PM

I just created java application for Kindle. Due to limitation of Swing library on Kindle I switched to SWT (Standard Widget Toolkit) library. SWT uses native set of widgets for every system where application run. I use openjre and swt.jar and arm related so libraries (from old debian packages).

Application displays mobileread logo and finishes on tap the screen only.

It is not so much functionality, but it gives ability to run java app on kindle.

I will plan create KUAL extension to convinient way of running.

hbvit · Yesterday, 09:43 AM

Could someone else add your output`uname -a` command and firmware version for paparwhite 4?

On https://www.amazon.com/gp/help/custo...MQC26VQQMM8XSW corrent version:

Kindle Paperwhite (10th Generation)
5.18.1

As mentioned on https://github.com/bfabiszewski/kterm/pull/31/changes

**Note:** For firmware versions above 5.16.2.1.1, you will need to use the version ending in `-armhf` which can be found in [Github Releases](https://github.com/bfabiszewski/kterm/releases)

hbvit · Yesterday, 09:50 AM

Currently I have KPW 1, but want to buy KPW4 on next week. And want to prepare my dev env for KPW4.

dhdurgee · Today, 11:50 AM

Quote:

Originally Posted by hbvit

Which version of firmware is installed?

5.10.1.3

Dave

alllexx · Today, 02:34 PM

I don't have a PW4 -- I have a PW5, but with a close version to the one you're interested in, 5.18.6. Here's the output:

Code:

[root@kindle ~]# uname -a
Linux kindle 4.9.77-lab126 #1 SMP PREEMPT Wed Oct 29 16:56:57 UTC 2025 armv7l GNU/Linux

alllexx · Today, 02:44 PM

P.S. The binaries have to indeed be hardfloat, specifically armv7-eabihf. I either use docker (which uses qemu emulation) to build static binaries from alpine linux/arm/v7 images, or cross-compile with armv7-eabihf toolchains.

03-29-2026, 04:22 PM	#5
hbvit Junior Member Posts: 8 Karma: 10 Join Date: Mar 2026 Device: Kindle PW1	I just created java application for Kindle. Due to limitation of Swing library on Kindle I switched to SWT (Standard Widget Toolkit) library. SWT uses native set of widgets for every system where application run. I use openjre and swt.jar and arm related so libraries (from old debian packages). Application displays mobileread logo and finishes on tap the screen only. It is not so much functionality, but it gives ability to run java app on kindle. I will plan create KUAL extension to convinient way of running. Attached Thumbnails

Yesterday, 09:43 AM	#6
hbvit Junior Member Posts: 8 Karma: 10 Join Date: Mar 2026 Device: Kindle PW1	Could someone else add your output`uname -a` command and firmware version for paparwhite 4? On https://www.amazon.com/gp/help/custo...MQC26VQQMM8XSW corrent version: Kindle Paperwhite (10th Generation) 5.18.1 As mentioned on https://github.com/bfabiszewski/kterm/pull/31/changes Note: For firmware versions above 5.16.2.1.1, you will need to use the version ending in `-armhf` which can be found in [Github Releases](https://github.com/bfabiszewski/kterm/releases) Last edited by hbvit; Yesterday at 09:47 AM. Reason: Update

Today, 02:34 PM	#9
alllexx Junior Member Posts: 5 Karma: 10 Join Date: Jul 2024 Device: Kindle Paperwhite 11	I don't have a PW4 -- I have a PW5, but with a close version to the one you're interested in, 5.18.6. Here's the output: Code: [root@kindle ~]# uname -a Linux kindle 4.9.77-lab126 #1 SMP PREEMPT Wed Oct 29 16:56:57 UTC 2025 armv7l GNU/Linux

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03-27-2026, 02:22 PM	#1
hbvit Junior Member Posts: 8 Karma: 10 Join Date: Mar 2026 Device: Kindle PW1	Output uname command Could you send your output of 'uname -a' command in kterm in kindle paperwhite 4

03-27-2026, 04:03 PM	#2
dhdurgee Guru Posts: 928 Karma: 3000002 Join Date: Jun 2010 Device: K3W, PW4	[root@kindle root]# uname -a Linux kindle 4.1.15-lab126 #1 SMP PREEMPT Tue Nov 27 03:27:44 PST 2018 armv7l GNU/Linux [root@kindle root]#

03-28-2026, 08:46 AM	#3
hbvit Junior Member Posts: 8 Karma: 10 Join Date: Mar 2026 Device: Kindle PW1	Which version of firmware is installed?

03-28-2026, 09:02 AM	#4
hbvit Junior Member Posts: 8 Karma: 10 Join Date: Mar 2026 Device: Kindle PW1	Could you download JRE version 17 from GitHub and check its work on your Paperwhite. https://github.com/adoptium/temurin1....0.18_8.tar.gz Extract archive and run jdk-17.0.18+8-jre/bin/java -version

Yesterday, 09:50 AM	#7
hbvit Junior Member Posts: 8 Karma: 10 Join Date: Mar 2026 Device: Kindle PW1	Currently I have KPW 1, but want to buy KPW4 on next week. And want to prepare my dev env for KPW4.

Today, 02:44 PM	#10
alllexx Junior Member Posts: 5 Karma: 10 Join Date: Jul 2024 Device: Kindle Paperwhite 11	P.S. The binaries have to indeed be hardfloat, specifically armv7-eabihf. I either use docker (which uses qemu emulation) to build static binaries from alpine linux/arm/v7 images, or cross-compile with armv7-eabihf toolchains.